public void Mutate(Measure measure)
{
var randomRate = ThreadSafeRandom.ThisThreadsRandom.Next(0, 100);
if (randomRate < Rate)
{
var geneticEventsManager = Singleton <GeneticEventsManager> .Instance();
var randomEvent = geneticEventsManager.RandomEventWithRate();
var index = ThreadSafeRandom.ThisThreadsRandom.Next(measure.Events.Count);
if (randomEvent == (int)RestOrTie.Rest)
{
while (index + 1 < measure.Events.Count && measure.Events[index + 1].Number == (int)RestOrTie.Tie)
{
index = ThreadSafeRandom.ThisThreadsRandom.Next(measure.Events.Count);
}
measure.Events[index] = new Rest(randomEvent, index);
return;
}
if (randomEvent == (int)RestOrTie.Tie)
{
while (index == 0 || (index - 1 >= 0 && measure.Events[index - 1].Number == (int)RestOrTie.Rest))
{
index = ThreadSafeRandom.ThisThreadsRandom.Next(measure.Events.Count);
}
measure.Events[index] = new Tie(randomEvent, index);
return;
}
var noteName = NoteUtilities.GetNoteName((SevenBitNumber)randomEvent).ToString();
measure.Events[index] = new Note(noteName, randomEvent, index);
}
}
private Measure GetNewMeasureWithOriginalTies(int order)
{
var events = new List <Event>();
var geneticEventsManager = Singleton <GeneticEventsManager> .Instance();
var indexOfevent = 0;
while (events.Count < BaseMelody.SizeOfMeasure)
{
var randomEvent = geneticEventsManager.RandomRestOrNote();
if (BaseMelody.Measures[order].Events[indexOfevent].Number == (int)RestOrTie.Tie)
{
// Ensure that ties are not generated after rests
if (events.Last().Number == (int)RestOrTie.Rest)
{
events.Remove(events.Last());
var note = geneticEventsManager.RandomNote();
var name = NoteUtilities.GetNoteName((SevenBitNumber)note).ToString();
events.Add(new Note(name, note, events.Count));
}
events.Add(new Tie((int)RestOrTie.Tie, events.Count));
}
else
{
// Ensure that ties are not generated in first position
if (indexOfevent == 0 && (randomEvent == (int)RestOrTie.Tie))
{
continue;
}
// Ensure that ties are not generated after rests
if (events.Any() && events.Last().Number == (int)RestOrTie.Rest && randomEvent == (int)RestOrTie.Tie)
{
continue;
}
switch (randomEvent)
{
case (int)RestOrTie.Rest:
events.Add(new Rest(randomEvent, events.Count));
break;
default:
var name = NoteUtilities.GetNoteName((SevenBitNumber)randomEvent).ToString();
events.Add(new Note(name, randomEvent, events.Count));
break;
}
}
indexOfevent++;
}
return(new Measure(events, order));
}
public Event Clone()
{
if (Number == (int)RestOrTie.Tie)
{
return(new Tie(Number, Order));
}
if (Number == (int)RestOrTie.Rest)
{
return(new Rest(Number, Order));
}
var name = NoteUtilities.GetNoteName((SevenBitNumber)Number).ToString();
return(new Note(name, Number, Order));
}
public void Mutate(Measure measure)
{
if (!measure.Events.OfType <Rest>().Any())
{
return;
}
var randomRate = ThreadSafeRandom.ThisThreadsRandom.Next(0, 100);
if (randomRate < Rate)
{
var geneticEventsManager = Singleton <GeneticEventsManager> .Instance();
for (int i = 0; i < measure.Events.Count; i++)
{
if (measure.Events[i].Number == (int)RestOrTie.Rest && i + 1 < measure.Events.Count && measure.Events[i + 1].Number == (int)RestOrTie.Tie)
{
var randomNote = geneticEventsManager.RandomNote();
var noteName = NoteUtilities.GetNoteName((SevenBitNumber)randomNote).ToString();
measure.Events[i] = new Note(noteName, randomNote, i);
}
}
}
}
/// <summary>
/// Gets name of the note presented by the specified <see cref="NoteEvent"/>.
/// </summary>
/// <param name="noteEvent">Note event to get note name of.</param>
/// <returns>Note name of the <paramref name="noteEvent"/>.</returns>
/// <exception cref="ArgumentNullException"><paramref name="noteEvent"/> is null.</exception>
public static NoteName GetNoteName(this NoteEvent noteEvent)
{
ThrowIfArgument.IsNull(nameof(noteEvent), noteEvent);
return(NoteUtilities.GetNoteName(noteEvent.NoteNumber));
}